In 3D printer mode, the bed is usually regarded as Z=0 and the uppermost travel is regarded as maximum Z, a positive number.

In CNC mode, upper Z travel is generally regarded as Z=0; all Z travel is represented by negative numbers. "Work Coordinate Systems" are often used to set Z=0=topofstock... and Z travel continues to be negative numbers.

the bug is in the configuration tool, that generates a homing macro that always sets Z position to low end after homing independent whether Z stop is at low or high end. I want to change X and Y to high end later. We will see whether the same bug is in there.

The G92 command used to be commented out by default? But I experienced an issue where the config tool didn't generate a setup for Z limit switch when no Z probe was selected, this caused the Z position to be incorrect when homing.

Post your config.g and homing macros so we can see whats going on to help

then this might solve today. Actually I am integrating a Z Probe mechanism. I have three switches on the bed and want to probe the tool itself. The reason is that I have a 43mm mount where I want to mount a laser, an extruder or even a mill. Maybe you can point me to the direction (link) and save me a lot of time figuring this out.

I thought this board was ready to use. OK, I got this with 2.02RC5(RTOS) (2018-11-28b1) flashed. Should I go back to a release version? I cannot waste time to do software testing. I wanted a board ready to work, Now I connected the bed heater and a PT1000 and got an error that the termister is shorted. I meassure 1.1V at the input what is appropriate with a PT1000 and a 2.2k pullup resistor. It is the C-input. The bed input I did not find on the Maestro.

It is ready to use. And the first thing it does when you power it up is read the configuration from the SD card. Unfortunately that's the only way that the board can "know" what sort of printer you have and how it is configured. If that information is incorrect, it will misbehave.

I thought of problems of the RC either and will try the release today. Last time I looked, this seemed to be the latest version. The problem is, that this is too complex to know everything at the beginning. I can do root cause analysis on aircraft electronic failures, but I am an absolute beginner on Duett. So please guide me.

Concerning the Z Axis settings: This was my latest setup. It has the advantage of setting the Z value to zero manually. The config tool does not set to maximum in any configuration I tried. Is the source code available? I will fix it myself if no one does.

It is to early to tweak the config files by hand. I still have to do some improvements on the hardware.

Deleting the malicious line from homez.g and homeall.g does the trick. DC42 mentioned somewhere that the firmware sets the value correct upon hitting the end stop. So no need to mess it up.

The PT1000 does not work on the bed thermistor input either. It tells a short when connected and an open circuit when disconnected. I measure a slightly different voltage. Does someone save a few Cents by not using 0.1% resistors or does the CPU have such a bad reference voltage?

I set back the range to positive values from zero like it was before I started trying different configuration.

I have the three Z stepper on three external TB6600 (modified the opto-coupler of this garbage to make it work) and a 74HC245 as driver (the only suitable chip conrad had in stock) together with a fancy circuitry for synchronization at the Z stop I developed. But this was a mistake either. The board can do this better. I read today. So I will change this to the internal drive and use a TB6600 for the extruder. Or better the add on board. We will see. I hope I will find the article about Z axis synchronization with Z probing again. It looked like it was made for me.

I thought of problems of the RC either and will try the release today. Last time I looked, this seemed to be the latest version. The problem is, that this is too complex to know everything at the beginning. I can do root cause analysis on aircraft electronic failures, but I am an absolute beginner on Duett. So please guide me.

Concerning the Z Axis settings: This was my latest setup. It has the advantage of setting the Z value to zero manually. The config tool does not set to maximum in any configuration I tried. Is the source code available? I will fix it myself if no one does.

It is to early to tweak the config files by hand. I still have to do some improvements on the hardware.

Just picked this one up as it sounds similar to the issue I was having (feel free to look at my numerous posts vis a vis upgrading my board/ firmware/ gcode #basically-a-new-printer) and really must say... oh. my. god.

Between the wikis and the forums, this place is an absolute treasure trove of information! The folks here have cultivated/ created/ generated one of the best open-source resources (personally) I've ever seen. The participation from people a) willing to help and b) able to help is outstanding; without having to wait 3 weeks for the 1 guy who doesn't have his arse facing the sky to send a semi-helpful reply.

remember this is open-source and has multiple applications and many many many more methods of doing so;

ask nicely and show some humility - coming here (where resides some clever folks from my observations) throwing the bosses weekly buzzwords like RCA isn't going to win you any favours and either is banging the drum about aircraft electronics like it's going to impress anyone

... fortunately, the people with the noodles are so nice they continue to help regardless